1. The high loss materials, elastomers, foams, and polymers all have low stiffness. Epoxy granite makes an amazing machine base, but there is a bit of work that goes into it. You can use a bathroom scale to do this. Epoxy granite: a structural material for precision machines P.A. Pour in part A of epoxy, and thoroughly mix for 2-3 minutes, the epoxy won't cure until part B is added, so no need to panic. The key to a good machine base is a solid mix job. McKeown* and G.H. Can be purchased from most landscaping yards. The deck thickness may need to be re-enforced depending on the weight of the machine base. 1. Vibrated for first 30 minutes during cure. However, the epoxy granite material fills in all of the rest of the space, providing the vibration damping, and also looking pretty good. This is binder that holds everything together. Epoxy granite makes an amazing machine base, but there is a bit of work that goes into it. 1. Somehow I decided to start playing around with epoxy granite… It's plotted against Young's Modulus (Stiffness). This sample came out great (the white on the ends is the wax from the mold release). within couple of microns precision. (Note, side panel of mold wall removed here for photo). Best of both worlds, high stiffness, and incredible vibration damping: This looks composite frame is shown below. epoxy kit. Vibrated for first 30 minutes during cure. 2. When the working time is up, turn off the vibration table, and use fast passes with a heat gun on the surface of the epoxy to pop any remaining bubbles. This is a lot to ask. German Epoxy Granite Milling Machine Here's an awesome project I recently heard about on CNCZone: That machine is solid! Play Sand. ): The epoxy granite mixture being used is 30% granite … What it will do is help remove more of the trapped air from the molds, especially if they're more than an inch or two deep. We retail, wholesale, fabricate and install natural stone … Thick molds can take up to 48 hours to cure. This time a vacuum pump was used to try and pull air out of the epoxy test piece. Here is the 3d model which i used to build my DIY VMC. The reference surfaces are all made of aluminum, and machined to exact dimensions. Read all about how to do it in my article on Epoxy Granite fills. The aluminum reference surfaces are all joined by an internal aluminum skeleton frame. Vibrated for first 30 minutes during cure. Pour in part B of epoxy, and mix thoroughly for 5-10 minutes. Granite, Marble, Stone, Tile, Crack/Chip Rep… When the working time is up, turn off the vibration table, and use fast passes with a heat gun on the surface of the epoxy to pop any remaining bubbles. Can be purchased from most landscaping yards. Rocks/gravel. The result of putting in all of this work. Sharp 90 degree corners are a recipe for disaster, filling them in will be hard, and they will be prone to chipping. Make sure the skeleton frame doesn't get any wax on it. The motor will generate the needed vibrations, and the feet help isolate the vibrations to just the platform. You want to make sure the largest rocks in the gravel are less than 1/3rd the width of the thinnest section of your casting, otherwise you may have flow issues. Wipe off the excess mold release, and then repeat the application. Before I was getting serious on this build I started playing around in CAD and I liked the idea of casting the structure of a machine. Effect of Frame on Machine Performance. Now the mold is built and waxed with internal skeleton frame in place. Apply the mold was to the entire surface at this time, letting it dry. Simply bolt the feet and shaker motor to the plywood deck. Filling the machine castings with Epoxy Granite with Epoxy Granite (sometimes also called “Polymer Concrete”) has been a time-honored … Fritz Studer AG of Switzerland first came up with its Granitan S-100 technology in the early 1970s. There are two ways of easily casting parts at home. Make sure the skeleton frame doesn't get any wax on it. This is used to turn the mixture to a darker color of your choice in order to improve aesthetics. This machine base will be incredible solid, dampen all the vibrations and will impress anyone that works with the equipment sitting on top. Some machine … This is a full tutorial on how to achieve fantastic results. Any variety is fine, round or smooth. A shaker table is a nice to have, but not necessary. The reference surfaces are all made of aluminum, and machined to exact dimensions. There are 3 simple parts you need to buy, totaling around 100$. Assembly the mold together by fastening all of the pieces together. Wipe off the excess mold release, and then repeat the application. Dye. Sand was put through a sieve to separate out the smallest particles to form the 17% fine sand. Vibrated for first 30 minutes during cure. You really want to minimize the amount of air that is mixed in at this point. Black iron oxide can be used (Fe3O4, purchased online), epoxy dye, or any paint pigment could also be used.